| abstract |
Concentrated cooling liquid, generally for heat exchangers, particularly for cooling systems of combustion engines, gas compressors, cold-storage rooms systems, heat exchangers for utilization of solar power and similar applications, comprises 80 to 95 wt.% of glycerol, 1 to 12 wt.% of water, 2.0 to 5.0 wt.% of at least two additives selected of the group formed by corrosion inhibitors, stabilizing additives, additives for pH adjustment, improving additives and additives which prevent unintentional replacement for other liquids. Advantageously it comprises 1.5 to 3.5 wt.% of a corrosion inhibitor formed by an alkaline salt, advantageously the sodium salt of monocarboxylic and/or dicarboxylic acids C6 to C12, further it comprises an additive for pH adjustment formed by an alkaline salt, advantageously the sodium salt of glycerylboric acid in the quantity of 0.5 to 2 wt.%, or alkaline hydrogencarbonate, advantageously potassium hydrogencarbonate in the quantity of 0.1 to 1.0 wt %. It does not comprise any glycols, it is nontoxic and noncorrosive. The diluted cooling liquid further comprises demineralized, tap or drinking water in volume proportions of 1 part of the concentrated cooling liquid to 0.01 to 10 parts of water. |